Originally Posted by BMM
Superman Returns is a sequel to Donner's movie, and, yes, it did borrow from it.
Over in the Superman boards they said it was not a sequel it's just set in the same universe based on interviews Singer gave, good luck figuring out that one. Although there are other reasons that one is the biggest reason I hate Superman Returns. X-Men 3 was nowhere near the mess that movie turned out to be IMO.